LEGO 9891 Angle Sensor is a vintage Dacta set from 1995 valued at $39 for new and sealed sets, up 57% from an original retail price of $24.99. Annual appreciation has averaged 1.77% since release. Used copies are valued between $13 and $16 depending on condition.
LEGO 9891 Angle Sensor is a Dacta Technic accessory set released in 1995, containing 1 piece. The component is a functional sensor designed to detect rotational position on a Technic axle for educational control and robotics applications. It connects to compatible LEGO Dacta control interfaces of the period for classroom experiments, motion measurement, and programming activities. The sensor is typically integrated with Technic beams, gears, and motors to provide feedback for controlled mechanisms.
A new and sealed Angle Sensor is currently valued at around $39, with annual growth of approximately 2%, which is lower than other Technic sets. The average used price is $13 for those in good overall condition. Based on current trends, this set could be valued near $40 within the next year.
Angle Sensor (9891-1) is a very old and rare LEGO set. It has not been available online or in retail stores in good/new condition for over 2 years. Because of its scarcity, the current estimated value of in new condition of $39.12 may be much lower than its true market value. Released in 1995, sealed sets in good condition are especially difficult to find, often commanding a premium well above estimates.
There are currently no new/sealed listings available for Angle Sensor at this time.
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